Liquid fuel burning heaters



Dec. 29, 1970 H. c. HEBARD LIQUID FUEL BURNING HEATERS 2 Sheets-Sheet 1Filed Sept 20, 1968 I INVENTOR HUGH CHARLES HEBARD BY Nomi H. cm HEBARDLIQUID FUEL BURNING HEATERS Dec. 29, 1970 2 Sheets-Sheet 2 Filed Sept.20, 1968 FIG. 4.

INVENTOR HUGH CHARLES HEBARD United States Patent ()flice Patented Dec.29, 1970 3,551,086 LIQUID FUEL BURNING HEATERS Hugh C. Hebard, HighWycombe, England, assignor to Aladdin Industries Limited, Greenford,England, a British company Continuation-impart of application Ser. No.602,910,

Mar. 1, 1966. This application Sept. 20, 1968, Ser. No. 761,166 Claimspriority, application Great Britain, Aug. 8, 1968, 37,892/ 68 Int. Cl.F23d 13/12 U.S. Cl. 431-307 2 Claims ABSTRACT OF THE DISCLOSURE Anannular wick which can be secured to a movable wick carrier withoutremoving the latter from the burner of a liquid fuel burning heater,said wick having secured to its outer surface at least one pair ofcircumferentially spaced socket members which are adapted to receivearms on the wick carrier which enter into locking engagement with thesocket members when the wick is rotated relative to the wick carrier.

This is a continuation-in-part of my application Ser. No. 602,910 filedMar. 1, 1966 now U.S. Pat. No. 3,406,003.

This invention relates to liquid fuel burning heaters of the kind inwhich an annular wick is detachably secured to a carrier capable ofbeing raised and lowered by an externally operable pinion engaging arack on the carrier.

A common method of fitting the wick to the carrier is to provide lugs onthe latter which are moved circumferentially into engagement withsockets secured to the former. With such an arrangement it is usuallynecessary to disengage the rack from the pinion and remove the wickcarrier from the burner whenever the wick requires renewal, anddifiiculty is often experienced in replacing the carrier due to thetendency of the lugs thereon to slip out of engagement with the socketson the new wick.

The principal object of the present invention is to the arms 7 of anarcuate wick carrier 8 (FIG. 3) and each consisting of a thin metalplate shaped to fit the curvature of the wick and secured thereto byprongs (not shown) which pierce the wick fabric and are turned over onthe inside thereof. Each plate is formed with a central socket portion 9above and below which it is turned outward to provide parallel radialprojections 10.

The wick carrier 8 accurately fits the inner surface of the outer wicktube 5 of the burner and is provided at its central portion with avertical rack 12 which engages a pinion 13 on the inner end of a shaft14 provided at its I outer end with a knob or handwheel 15 for manualovercome this difiiculty and to this end, according to the invention, atleast one pair of circumferentially spaced socket members are secured tothe outer surface of the wick, are adapted to receive co-operatingmembers on the wick carrier and are movable circumferentially intolocking engagement with said sockets upon rotational movement of thewick relative to the wick carrier.

A preferred embodiment of the invention will be described, by way ofexample, with reference to the accompanying drawings in which:

FIG. 1 is an elevational view of a wick;

FIG. 2 is a shortened elevational view of the wick taken at right anglesto FIG. 1;

FIG. 3 is a perspective view of a wick carrier;

FIG. 4 is a sectional elevation of part of a burner structureincorporating the wick and wick carrier of FIGS. 1 to 3; and

FIG. 5 is a horizontal section on the line V-V of 'FIG. 4.

The annular wick shown in FIGS. 1 and 2 includes an upper cylindricalportion 1, the inner and outer surfaces of which are reinforced andprotected by strips of adhesive tape or like material (not shown), andtwo separate tail portions 2 depending therefrom and which in operationextend into the fuel reservoir 3 of the burner shown in FIGS. 4 and 5and pass between inner and outer wick tubes 4 and 5 respectively. Atdiametrically opposed points on the outer surface of the portion 1 ofthe wick there are mounted two clips 6 adapted to be engaged byoperation. Each arm 7 of the wick carrier 8 is formed adjacent its endwith a raised portion 16 for engagement in the socket portion 9 of aclip 6 and a portion 17 comprising a continuation of the main portion ofthe wick carrier.

To fit the burner with a new wick to which clips '6 have already beensecured, the rack and pinion 12, 13 is operated to lower the wickcarrier 8 as far as it will go and the new wick is drawn down over theinner wick tube 4 until the clips are positioned about /2" above theupper edge of the outer wick tube 5. After ensuring, by rotation of thewick if necessary, that the clips are out of vertical alignment with theraised portions 16 of the wick carrier, the tail portions 2 of the wickare firmly grasped to prevent upward movement of the wick and theoperating shaft 14 is rotated by means of the knob 15 to raise the wickcarrier 8. When the raised portions 16 on the arms 7 reach a point atwhich they are circumferentially aligned with the socket portions of theclips 6, the wick is rotated until said raised portions enter thesockets 6. The wick carrier 8 and with it the new wick, is then loweredinto the operative position in which the upper end of the carrier iswholly within the outer wick tube 5. In this position, the raisedportions 16 of the wick carrier are prevented by the projections 10 frommoving vertically out of the socket portions and the wick is thus firmlyattached to the wick carrier 8.

I claim:

1. For use in a liquid fuel burning apparatus, the combination of anannular wick having fixed to its exterior at least one pair ofcircumferentially spaced outwardly open socket members, each socketmember comprising an outwardly open recess with external radiallyprojecting guide and locking portions above and below said recess, awick carrier surrounding said wick having arms extending in oppositecircumferential directions around said wick, each carrier arm having aninwardly projecting raised portion adapted to extend substantiallyradially from the carrier arm within the recess of an associated socketmember vertically between said guide and locking portions, saidprojecting portions on the carrier arms and said socket members being sostructurally related that said socket members may move circumferentiallyinto locking engagement with the projecting portions on said carrierarms upon rotational movement of said wick relative to said wickcarrier.

2. An annular wick according to claim 1, wherein each socket membercomprises a thin metal plate shaped to fit the curvature of said wickand secured thereto by prongs which pierce the wick fabric and areturned over for attachment onthe inside of said wick.

References Cited UNITED STATES PATENTS 1,570,434 I/ 1926 Chadwick et al431307 2,705,412 4/ 1955 Bramming 431-307 3,406,003 10/ 1968 Hebard431-307 CARROLL B. DORITY, JR., Primary Examiner

